// CodeMirror, copyright (c) by Marijn Haverbeke and others
// Distributed under an MIT license: http://codemirror.net/LICENSE

(function(mod) {
  if (typeof exports == 'object' && typeof module == 'object')
    // CommonJS
    mod(require('../../lib/codemirror'));
  else if (typeof define == 'function' && define.amd)
    // AMD
    define(['../../lib/codemirror'], mod);
  // Plain browser env
  else mod(CodeMirror);
})(function(CodeMirror) {
  'use strict';

  CodeMirror.defineMode('asn.1', function(config, parserConfig) {
    var indentUnit = config.indentUnit,
      keywords = parserConfig.keywords || {},
      cmipVerbs = parserConfig.cmipVerbs || {},
      compareTypes = parserConfig.compareTypes || {},
      status = parserConfig.status || {},
      tags = parserConfig.tags || {},
      storage = parserConfig.storage || {},
      modifier = parserConfig.modifier || {},
      accessTypes = parserConfig.accessTypes || {},
      multiLineStrings = parserConfig.multiLineStrings,
      indentStatements = parserConfig.indentStatements !== false;
    var isOperatorChar = /[\|\^]/;
    var curPunc;

    function tokenBase(stream, state) {
      var ch = stream.next();
      if (ch == '"' || ch == "'") {
        state.tokenize = tokenString(ch);
        return state.tokenize(stream, state);
      }
      if (/[\[\]\(\){}:=,;]/.test(ch)) {
        curPunc = ch;
        return 'punctuation';
      }
      if (ch == '-') {
        if (stream.eat('-')) {
          stream.skipToEnd();
          return 'comment';
        }
      }
      if (/\d/.test(ch)) {
        stream.eatWhile(/[\w\.]/);
        return 'number';
      }
      if (isOperatorChar.test(ch)) {
        stream.eatWhile(isOperatorChar);
        return 'operator';
      }

      stream.eatWhile(/[\w\-]/);
      var cur = stream.current();
      if (keywords.propertyIsEnumerable(cur)) return 'keyword';
      if (cmipVerbs.propertyIsEnumerable(cur)) return 'variable cmipVerbs';
      if (compareTypes.propertyIsEnumerable(cur)) return 'atom compareTypes';
      if (status.propertyIsEnumerable(cur)) return 'comment status';
      if (tags.propertyIsEnumerable(cur)) return 'variable-3 tags';
      if (storage.propertyIsEnumerable(cur)) return 'builtin storage';
      if (modifier.propertyIsEnumerable(cur)) return 'string-2 modifier';
      if (accessTypes.propertyIsEnumerable(cur)) return 'atom accessTypes';

      return 'variable';
    }

    function tokenString(quote) {
      return function(stream, state) {
        var escaped = false,
          next,
          end = false;
        while ((next = stream.next()) != null) {
          if (next == quote && !escaped) {
            var afterNext = stream.peek();
            //look if the character if the quote is like the B in '10100010'B
            if (afterNext) {
              afterNext = afterNext.toLowerCase();
              if (afterNext == 'b' || afterNext == 'h' || afterNext == 'o')
                stream.next();
            }
            end = true;
            break;
          }
          escaped = !escaped && next == '\\';
        }
        if (end || !(escaped || multiLineStrings)) state.tokenize = null;
        return 'string';
      };
    }

    function Context(indented, column, type, align, prev) {
      this.indented = indented;
      this.column = column;
      this.type = type;
      this.align = align;
      this.prev = prev;
    }
    function pushContext(state, col, type) {
      var indent = state.indented;
      if (state.context && state.context.type == 'statement')
        indent = state.context.indented;
      return (state.context = new Context(
        indent,
        col,
        type,
        null,
        state.context,
      ));
    }
    function popContext(state) {
      var t = state.context.type;
      if (t == ')' || t == ']' || t == '}')
        state.indented = state.context.indented;
      return (state.context = state.context.prev);
    }

    //Interface
    return {
      startState: function(basecolumn) {
        return {
          tokenize: null,
          context: new Context((basecolumn || 0) - indentUnit, 0, 'top', false),
          indented: 0,
          startOfLine: true,
        };
      },

      token: function(stream, state) {
        var ctx = state.context;
        if (stream.sol()) {
          if (ctx.align == null) ctx.align = false;
          state.indented = stream.indentation();
          state.startOfLine = true;
        }
        if (stream.eatSpace()) return null;
        curPunc = null;
        var style = (state.tokenize || tokenBase)(stream, state);
        if (style == 'comment') return style;
        if (ctx.align == null) ctx.align = true;

        if (
          (curPunc == ';' || curPunc == ':' || curPunc == ',') &&
          ctx.type == 'statement'
        ) {
          popContext(state);
        } else if (curPunc == '{') pushContext(state, stream.column(), '}');
        else if (curPunc == '[') pushContext(state, stream.column(), ']');
        else if (curPunc == '(') pushContext(state, stream.column(), ')');
        else if (curPunc == '}') {
          while (ctx.type == 'statement') ctx = popContext(state);
          if (ctx.type == '}') ctx = popContext(state);
          while (ctx.type == 'statement') ctx = popContext(state);
        } else if (curPunc == ctx.type) popContext(state);
        else if (
          indentStatements &&
          (((ctx.type == '}' || ctx.type == 'top') && curPunc != ';') ||
            (ctx.type == 'statement' && curPunc == 'newstatement'))
        )
          pushContext(state, stream.column(), 'statement');

        state.startOfLine = false;
        return style;
      },

      electricChars: '{}',
      lineComment: '--',
      fold: 'brace',
    };
  });

  function words(str) {
    var obj = {},
      words = str.split(' ');
    for (var i = 0; i < words.length; ++i) obj[words[i]] = true;
    return obj;
  }

  CodeMirror.defineMIME('text/x-ttcn-asn', {
    name: 'asn.1',
    keywords: words(
      'DEFINITIONS OBJECTS IF DERIVED INFORMATION ACTION' +
        ' REPLY ANY NAMED CHARACTERIZED BEHAVIOUR REGISTERED' +
        ' WITH AS IDENTIFIED CONSTRAINED BY PRESENT BEGIN' +
        ' IMPORTS FROM UNITS SYNTAX MIN-ACCESS MAX-ACCESS' +
        ' MINACCESS MAXACCESS REVISION STATUS DESCRIPTION' +
        ' SEQUENCE SET COMPONENTS OF CHOICE DistinguishedName' +
        ' ENUMERATED SIZE MODULE END INDEX AUGMENTS EXTENSIBILITY' +
        ' IMPLIED EXPORTS',
    ),
    cmipVerbs: words('ACTIONS ADD GET NOTIFICATIONS REPLACE REMOVE'),
    compareTypes: words(
      'OPTIONAL DEFAULT MANAGED MODULE-TYPE MODULE_IDENTITY' +
        ' MODULE-COMPLIANCE OBJECT-TYPE OBJECT-IDENTITY' +
        ' OBJECT-COMPLIANCE MODE CONFIRMED CONDITIONAL' +
        ' SUBORDINATE SUPERIOR CLASS TRUE FALSE NULL' +
        ' TEXTUAL-CONVENTION',
    ),
    status: words('current deprecated mandatory obsolete'),
    tags: words(
      'APPLICATION AUTOMATIC EXPLICIT IMPLICIT PRIVATE TAGS' + ' UNIVERSAL',
    ),
    storage: words(
      'BOOLEAN INTEGER OBJECT IDENTIFIER BIT OCTET STRING' +
        ' UTCTime InterfaceIndex IANAifType CMIP-Attribute' +
        ' REAL PACKAGE PACKAGES IpAddress PhysAddress' +
        ' NetworkAddress BITS BMPString TimeStamp TimeTicks' +
        ' TruthValue RowStatus DisplayString GeneralString' +
        ' GraphicString IA5String NumericString' +
        ' PrintableString SnmpAdminAtring TeletexString' +
        ' UTF8String VideotexString VisibleString StringStore' +
        ' ISO646String T61String UniversalString Unsigned32' +
        ' Integer32 Gauge Gauge32 Counter Counter32 Counter64',
    ),
    modifier: words(
      'ATTRIBUTE ATTRIBUTES MANDATORY-GROUP MANDATORY-GROUPS' +
        ' GROUP GROUPS ELEMENTS EQUALITY ORDERING SUBSTRINGS' +
        ' DEFINED',
    ),
    accessTypes: words(
      'not-accessible accessible-for-notify read-only' +
        ' read-create read-write',
    ),
    multiLineStrings: true,
  });
});
